基于均值骨架的网格变形复制

Mesh deformation transfer based on mean-value skeleton

为了快速重用源网格变形序列,提出一种在线性空间中基于均值骨架的网格变形复制算法.该算法首先通过计算均值骨架及其坐标,自动建立源网格与目标网格的对应关系,无须前期用户指定对应点;然后通过均值骨架坐标与微分域坐标变形技术的融合,将目标网格的变形转化为线性的能量约束问题;最后利用线性最小二乘法计算出目标网格的变形序列,在实现高效计算的同时保持目标网格的几何特征.通过实例证明,该方法不仅能够实时地生成视觉真实的变形复制结果,而且无须用户专业性操作,适合动画制作初学者.

A linear mesh deformation transfer based on mean-value skeleton was introduced for rapid reusing source mesh sequences.First,the target mesh establishes a corresponding relationship with the source mesh automatically through the mean-value skeleton and related coordinates,instead of the traditional corresponding markers specification by user.Then,the mean-value skeleton and differential domain technology are incorporated in the target mesh deformation,and the main computation is a solution of a linear energy constraint problem.Finally,the deformed target meshes are generated using the linear minimum square method,so it preserves the local geometry detail of the deformed target meshes through efficient computation.A variety of examples demonstrated that the algorithm produces vision plausible deformation transfer in real-time,and it is well suitable for new animators with no professional operations.